<template>
	<view>
		<!-- :bgcolor="'#FA516B'"
		:radius="'15'" -->
		<my-search 
		@click="gotoSearch"></my-search>
		<view class="scroll-view-container">
			<!-- 左侧标题滑动区 -->
			<scroll-view  class="left-scroll-view" scroll-y="true" :style="{height: wh  + 'px'}">
				<block v-for="(item, i) in cateList" :key="i">
					<view :class="['left-scroll-view-item', i === active ? 'active' : '']" @click="activeChanged(i)">{{item.cat_name}}</view>
				</block>
			</scroll-view>
			
			<!-- 右侧内容滑动区 -->
			<scroll-view class="right-scroll-view" scroll-y="true" :scroll-top="scrollTop" :style="{height: wh  + 'px'}">
				<view class="cate-lv2" v-for="(item2, i2) in cateLevel2" :key="i2">
					<!-- 二级分类标题 -->
					<view class="cate-lv2-title" v-if="item2.children">
						/ {{item2.cat_name}} /
					</view>
					<!-- 三级分类盒子 -->
					<view class="cate-lv3-list">
						<view class="cate-lv3-item"  v-for="(item3, i3) in item2.children" :key="i3" @click="gotGoodsList(item3)">
							<!-- 三级分类图片 -->
							<image :src="item3.cat_icon" ></image>
							<!-- 三级分类文本 -->
							<text>{{item3.cat_name}}</text>
						</view>
					</view>
				</view>
			</scroll-view>
		</view>
	</view>
</template>

<script>
	import mixBadge from '@/mixins/tabbar-badge.js'
	export default {
		mixins: [mixBadge],
		data() {
			return {
				wh: 0,
				cateList: [],
				active: 0,
				cateLevel2: [],
				cateLevel3: [],
				scrollTop: 1
			}
		},
		onLoad() {
			// 调用获取分类数据的方法
			this.getCateList()
			const sysInfo = uni.getSystemInfoSync()
			this.wh = sysInfo.windowHeight - 50
		},
		methods: {
			// 获取分类列表数据
			async getCateList() {
				const { data:res } = await uni.$http.get('/api/public/v1/categories')
				if(res.meta.status !== 200 ) {
					return uni.$showMsg()
				}
				this.cateList = res.message
				// 为二级分类赋值
				this.cateLevel2 = res.message[0].children
			},
			activeChanged(i) {
				this.active = i
				// 改变二级分类值
				this.cateLevel2 = this.cateList[i].children
				// 让scrollTop的值在0和1之间变化
				this.scrollTop = this.scrollTop === 0 ? 1 : 0
			},
			gotGoodsList(item3) {
				uni.navigateTo({
					url: '/subpkg/goods_list/goods_list?cid=' + item3.cat_id
				})
			},
			
			// 导航到search页面
			gotoSearch() {
				uni.navigateTo({
					url: '/subpkg/search/search'
				})
			}
		}
	}
</script>

<style lang="scss">
	.scroll-view-container {
		display: flex;
		.left-scroll-view {
			width: 120px;
			.left-scroll-view-item {
				background-color: #f1f1f1;
				line-height: 60px;
				text-align: center;
				font-size: 12px;				
				&.active {
					background-color: #FFF;
					position: relative;
					
					&::before {
						content: ' ';
						display: block;
						width: 3px;
						height: 30px;
						top: 50%;
						left: 0;
						position: absolute;
						background-color: #C00;
						transform: translateY(-50%);
					}
				}
			}
		}
		.cate-lv2-title {
			padding: 15px 0;
			font-size: 14px;
			text-align: center;
			font-weight: 600;
		}
		
		.cate-lv3-list {
			display: flex;
			flex-wrap: wrap;
			.cate-lv3-item {
				display: flex;
				flex-direction: column;
				justify-content: center;
				align-items: center;
				width: 33.33%;
				margin-bottom: 10px;
				image {
					width: 60px;
					height: 60px;
				}
				text {
					font-size: 12px;
				}
			}
		}

	}
</style>
